45ml glass bottle of Endless Alchemy Poseidon's Reef fountain pen ink. This is a blue/teal ink with red/purple sheen. It evokes the mystical beauty of the ocean's depths.

With their fun-shaped bottle and a double-sided base, you can either play with your ink bottle on your desk or flip the cork base over to stand the bottle upright to fill your favorite pen! Each bottle comes with a story of inspiration of the alchemist's ability to wield each ink.

All of the Endless Alchemy inks are suitable for use in fountain pens and dip pens.